Blender Git Loki

Remove ui_gpencil_export_common_settings

Merge branch 'temp-gpencil-io' of git.blender.org:blender into temp-gpencil-io

Cleanup: Remove unecessary file

Remove commented lines

Merge branch 'temp-gpencil-io' of git.blender.org:blender into temp-gpencil-io

Cleanup: Remove unused includes

Various small cleanups

- Use consistent order for includes
- Remove unecessary `struct` use in cc files
- Small UI cleanups
- Some very small whitespace changes

Merge branch 'master' into sculpt-dev

Remove Submenu for Import/Export

Cleanup: allow looking up size of unsupported domains

There isn't really a reason for not supporting it.

Cleanup: use BLI_assert_unreachable in some places

BLI: add macro to indicate unreachable code

This adds a `BLI_assert_unreachable()` macro, that should be used instead
of `BLI_assert(false)` in many places.

* `BLI_assert_unreachable` provides more information than `BLI_assert(false)`
to people reading the code.
* `BLI_assert_unreachable` will print an error to `stderr` in a release build.
This makes it more likely that we will get bug reports when the assumptions
of a developer were wrong.

Differential Revision: https://developer.blender.org/D10780

Pose Library: expand blend operator poll function

Expand the `POSELIB_OT_blend_pose` poll function to check whether there
is an actively selected pose, and don't crash even if the operator gets
called regardless.

Pose library: prevent double report when no asset can be loaded

Pose library: make reports translatable

add executor class

initial mf procedure data structure

Cleanup: WorkScheduler.

- Use constexpr for better readability.
- Split in functions per backend.
- Split work scheduler global struct in smaller structs.
- Replaced std::vector with blender::Vector.
- Removed threading defines in COM_defines.h

Geometry Nodes: Make plane primitive size consistent

This means the "Size" input is treated as a "diameter" instead of
a "radius", just like the 3D view primitives.

Fix (unreported) object duplicate code wrongly duplicating linked objects.

Linked data should only be duplicated if relevant `eDupli_ID_Flags` flag
is set (`USER_DUP_LINKED_ID`), this is being taken care of by generic
`BKE_id_copy_for_duplicate` function, but for some reasons (?)
`BKE_object_duplicate` was directly using `BKE_id_copy` for itself...

Note that this had especially bad consequences when duplicating
overrides of collections...